terrible vs very unpleasant

terrible

adv
  • In a terrible way; to a terrible extent; terribly; awfully. 

adj
  • Intense; extreme in degree or extent. 

  • Dreadful; causing terror, alarm and fear; awesome 

  • Formidable, powerful. 

  • Unpleasant; disagreeable. 

  • Very bad; lousy. 

very unpleasant

How often have the words terrible and very unpleasant occurred in a corpus of books? (source: Google Ngram Viewer )